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GE JVM1440wh04 Microwave works fine Lights, vent fan, turntable, clock all function no problem When unit is plugged in the Magnetron cooling fan runs continously. Door interlock does turn off fan when door is opend. Could not find any tempature or air flow sensor. Fan has 4 wires, Two from interlocks Two from molex connector on board, looks like the runs go to the relays Ordered 3 relays Changed High and Low relay on controller board Have one spare. Thinking a diode, continous ground??? No schematic, can not trace. Smart Board WB27X10608 Thanks

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SOURCE: Door shut off malfunction

I have the same problem starting yesterday April 19. Have you gotten any answers.

Posted on Apr 20, 2008

rickzilla
  • 706 Answers

SOURCE: Magnetron cooling fan

Are you sure it is the internal blower and not the VENT fan ?

Posted on Sep 01, 2008

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1 Answer

Kenmore Elite Microwave oven 63792 doesn't heat - all lights, turntable, fan, etc. work just fine.


Most likely it would be a bad magnetron since the light, turntable, and vent fan are running.

Sep 10, 2013 | Kenmore Elite Microwave, Model...

1 Answer

Same problem


your oven shut down because the magnetron got too hot (has a resetting thermal switch) .. it needs a constant and high flow rate of cooling air .. there is a fan that blows air over the magnetron fins ... sometimes the plastic frame that holds the fan becomes warped or broken .. the fan then doesn't deliver enough air to where its needed ... the squeaking noise however may indicate that the fan blade is either hitting the frame or the bearings in the fan motor need lubricated ... the fan is most likely the problem .. you can replace it or Lube it and repair any broken mounts .. make sure the fan turns freely and is aimed correctly .. use a light machine oil (intended for very small motors) or sewing machine oil .. not wd40 or oil with teflon .. your magnetron will be damaged if it continues to overheat .. you can gain access to the fan by removing the cover but do so only with the power disconnected and taped so no one can plug it in while you are working .. when plugged in there is potentially deadly voltage and current available inside .. . there are indeed two fans .. the vent fan and the magnetron cooling fan .. the loud laboring noise often happens if the magnetron is shorted or if the high voltage diode or voltage doubler capacitor is shorted ... but since your machine is still working until it gets hot i suspect those are not he problem yet but may be eventually damaged without cooling air flow .. that model GE did have problems with the fan mount and that in turn damaged some magnetrons ... the lube in the fan bearings generally is reliable up to 5 years depending on use .so that could be the problem as well

Jul 29, 2010 | GE JVM1440 Microwave Oven

1 Answer

My microwave stops goes dead after running for 2 minutes


It may be that the magnetron is overheating. The main causes:

- blocked air vents
- blocked air outlet or duct (if an over the range type)
- clogged grease filters needing to be cleaned
- clogged charcoal filter needing to be replaced
- failed internal cooling fan
- failing magnetron

Depending on the model, it may have a thermostat on the magnetron so that the power is killed if it overheats, then it comes back on when it cools down.

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

Please listen to that and compare it to yours. You may hear that your cooling fan is not running.

When I say internal cooling fan, I do not mean the hood vent exhaust fan which you can turn on and off manually.

I'm instead talking about the internal fan which comes on automatically whenever you microwave.

It is vital that the cooling fan runs, or the turntable and stirrer won't work, and magnetron will soon be destroyed.

If instead the microwave starts microwaving then it scrambles and then comes back up as if someone unplugged it for a couple of seconds and you can set the clock and start again, then you have a magnetron that is leaky.

Once you listen to that and check your vents, filters, etc., let us know what you find so we can take it from there.

Please note that FixYa is not currently notifying us Experts when Clarification Requests are answered.

To allow us to help you effectively (at no charge), please post a
NEW problem to FixYa, and please include your brand name and the full model number from the tag in or on the unit, and your detailed symptoms, as well as the results of these recommended checks.

Dec 12, 2009 | Samsung Microwave Ovens

1 Answer

Have GE JVM2050 over the range microwave, which stopped heating food and water since this morning. All other functions including light, key pad, clock, turntable work normal. The magnetron sound also


if everything works except the heating, it is most likely the mag tube is on its way out.........that is the most common reason for it not too cook.......since the microwave is a GE and it is 3.5 years old, i would say you are better off buying a new microwave, the mag tube starts at around $70.00 and up + the labor it costs too have a service person put it in........around another $60.00

May 02, 2009 | GE JVM2050 Microwave Oven

1 Answer

Microwave dead even though power works


It sounds like the magnetron overheated and opened the thermal fuse on the magnetron.

This can be caused when the internal cooling fan is not running or by a magnetron that is failing.

When I say internal cooling fan, I do not mean the hood vent exhaust fan which you can turn on and off manually.

I'm instead talking about the internal fan which comes on automatically whenever you microwave.

It is vital that the cooling fan runs, or the magnetron will be destroyed.

There should be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

You can also find helpful exploded view diagrams and order parts by entering your full model number here.

The magnetron will have a 5 to 9 year warranty. Your manual will tell you that.

You can download GE owner's manuals and installation instructions here.

If needed, GE may send you a replacement magnetron. GE Customer Service is here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Dec 04, 2008 | Microwave Ovens

1 Answer

Daewoo MT1510B problem


Chances are your magnetron is overheating, activating the magnetron thermostat, which resets and restores power when it cools.

Your manual may call for you to put a paper plate under the popcorn bag to heat better and to protect the turntable. (And always place the food slightly off-center on the turntable, for the same reasons!)

You should first confirm that the outlet reads about 110-120 volts AC and that the microwave is on its own breaker. If a microwave shares a breaker with another high current device (or even lights) it can affect operation.

Then be sure the microwave's internal cooling fan is running.

If this is an over the range model, it will also have a exhaust hood vent fan which you can turn on and off at will, but this is not the fan I'm talking about.

The internal cooling fan should be on whenever the oven is cooking. If not, the magnetron can overheat and eventually be destroyed.

The next issue is how long you've had the oven.

If it's within the 30-day dealer exchange period, I'd take it back for a new one pronto.

If it's within the full warrranty period (usually 1 year) Daewoo's service center should fix it free.

You can visit Daewoo online or call them at 1-800-323-9668 or 1-800-553-4355 to find parts or find your nearest authorized service center to have them do the work.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Oct 07, 2008 | Daewoo KOR-6115 Microwave Oven

1 Answer

Microwave function not working properly on GE Advantium SCA2000BCC03


I assume you're talking about the internal cooling fan, which should always be on when you're microwaving.

If it is not coming on, the magnetron can be destroyed from overheating!

The turntable and and cooling fan are both controlled by relay RY17 on the main circuit board.

We regularly repair these control units for customers nationwide with our guaranteed $39.95 service in about a week.

Feel free to contact me directly for more information & help.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Sep 24, 2008 | GE Advantium SCA2000B Microwave Oven

3 Answers

Magnetron cooling fan


Are you sure it is the internal blower and not the VENT fan ?

Aug 26, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

MCO160UW


It sounds like the magnetron is overheating and the magnetron-mounted thermostat is tripping.

This can happen if the internal cooling fan is not running - do you feel air strongly coming out the back or other vent?

If it has grease or other filters, be sure they are clean and not blocked.

Otherwise, the magnetron may be failing. Please post back once you've looked this over if you need more help.

Nov 02, 2007 | Magic Chef CMV1000B Microwave Oven

2 Answers

Cannot heat


Sounds like it overheated, tripped the thermostat, then the thermostat reset. Chances are you have a bad magnetron. GE may have a campaign (not a "recall", mind you!) to offer free replacements if yours is a model that has a known history of problems with the magnetrons. I would call GE and ask them about that. *grin* GE Answer Center 1-800-626-2005 24 hours a day, 365 days a year

Dec 13, 2006 | GE Spacemaker JVM1640SJ Microwave Oven

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